Microeconomics
Microeconomics is the branch of economics that studies the behavior of individual economic agents such as households, firms, and markets. It focuses on how these agents make decisions regarding the allocation of scarce resources and how their interactions determine prices, production, and distribution of goods and services.
Breviarium
Problems:
- Analyzing tradeoffs.
- A set of constrained optimization problems.
- Studying how individuals and firms make themselves as well off as possible given conditions of scarcity.
Field Structure
| 🔍 Subfield |
📄 Description |
| Consumer Theory |
Study of how individuals make consumption decisions to maximize utility subject to budget constraints. |
| Producer Theory |
Analysis of how firms decide on production quantities, input combinations, and cost minimization. |
| Market Structures |
Examination of different market forms such as perfect competition, monopoly, oligopoly, and monopolistic competition. |
| Game Theory |
Study of strategic interactions among rational decision-makers, including cooperation and competition. |
| Market Failure and Externalities |
Investigation of situations where markets fail to allocate resources efficiently, including public goods, externalities, and information asymmetries. |
| Information Economics |
Analysis of how asymmetric information affects market outcomes and economic behavior. |
| Welfare Economics |
Evaluation of economic efficiency and equity in resource allocation, including social welfare and policy implications. |
| Labor Economics (Micro Aspect) |
Study of individual labor market behavior, wage determination, and employment decisions. |
| Industrial Organization |
Analysis of firm behavior, market power, competition policy, and regulation. |
Research Problem
| 🔍 Research Problem |
📄 Description |
| Consumer Choice under Constraints |
Understanding how consumers maximize utility given income and prices. |
| Firm Production and Cost Optimization |
Investigating how firms decide input combinations and output levels to minimize costs and maximize profits. |
| Market Power and Monopoly Behavior |
Analyzing how firms with market power set prices and output, and how this affects welfare. |
| Oligopoly and Strategic Interaction |
Studying competition and cooperation among a few firms in markets with limited competition. |
| Externalities and Public Goods |
Examining cases where private decisions impose costs or benefits on others and how to address them. |
| Information Asymmetry and Adverse Selection |
Investigating markets where buyers and sellers have unequal information and the resulting inefficiencies. |
| Principal-Agent Problems |
Understanding contracts and incentives when one party (agent) acts on behalf of another (principal). |
| Price Discrimination and Market Segmentation |
Exploring how firms charge different prices to different consumers and its effects on markets. |
| Labor Market Discrimination |
Studying causes and consequences of discrimination in wages and employment opportunities. |
| 🛠️ Research Tool |
📄 Description |
| Mathematical Optimization |
Techniques (e.g., calculus, Lagrange multipliers) to solve utility maximization and cost minimization problems. |
| Game Theory Models |
Analytical frameworks to study strategic interactions between rational agents. |
| Experimental Economics |
Controlled lab or field experiments to test economic behavior and theories. |
| Econometric Analysis |
Statistical methods for estimating microeconomic models using real-world data. |
| Behavioral Economics Tools |
Methods incorporating psychological insights to understand deviations from rational behavior. |
| Contract Theory |
Formal models to analyze incentive structures and principal-agent relationships. |
| Mechanism Design |
Designing rules or mechanisms to achieve desired outcomes in strategic settings. |
| Simulation Modeling |
Computational models to simulate market dynamics and agent interactions. |
Key Results
| ✅ Key Result |
📄 Description |
| Law of Demand |
Consumers buy more of a good as its price decreases, ceteris paribus. |
| Marginal Utility and Diminishing Returns |
Additional satisfaction from consuming more of a good decreases as quantity increases. |
| Equilibrium in Competitive Markets |
Prices adjust to balance supply and demand, leading to efficient allocation of resources. |
| Market Power Leads to Deadweight Loss |
Monopoly pricing reduces total welfare compared to competitive markets. |
| Externalities Cause Market Failure |
Private markets may under- or over-produce goods when external costs or benefits exist. |
| Asymmetric Information Creates Inefficiencies |
Markets can fail when buyers and sellers have unequal information (e.g., adverse selection). |
| Strategic Behavior Influences Market Outcomes |
Firms and consumers’ decisions depend on expectations of others’ actions (game theory). |
| Incentive Compatibility is Key for Contracts |
Contracts must align incentives to ensure desired behavior from agents. |
Key Thinkers
| 🧠 Thinker |
📌 Contribution |
📚 Key Work |
| Adam Smith |
Foundations of classical economics, invisible hand concept |
The Wealth of Nations (1776) |
| Alfred Marshall |
Marginal utility, supply and demand curves, price elasticity |
Principles of Economics (1890) |
| Vilfredo Pareto |
Pareto efficiency and optimal resource allocation |
Various papers and works (early 20th century) |
| John von Neumann |
Game theory foundations |
Theory of Games and Economic Behavior (1944, with Oskar Morgenstern) |
| Kenneth Arrow |
Social choice theory, general equilibrium theory |
Social Choice and Individual Values (1951) |
| Gary Becker |
Economic analysis of social issues, human capital theory |
Various papers and Human Capital (1964) |
| Jean Tirole |
Industrial organization, regulation theory |
The Theory of Industrial Organization (1988) |
| Joseph Stiglitz |
Information economics, market failures |
Various papers and Information and the Change in the Paradigm in Economics (2002) |
| Paul Milgrom |
Auction theory, mechanism design |
Various papers |
| Eric Maskin |
Mechanism design, game theory |
Various papers |
References
- Elsner, W., Heinrich, T., & Schwardt, H. (2015). The Microeconomics of Complex Economies: Evolutionary, Institutional, Neoclassical, and Complexity Perspectives. Elsevier/Academic Press
- Guiso, Luigi, Paola Sapienza, and Luigi Zingales. "Does culture affect economic outcomes?." Journal of Economic perspectives 20.2 (2006): 23-48.
- Granovetter, Mark. "Economic action and social structure: The problem of embeddedness." American journal of sociology 91.3 (1985): 481-510.